[1][2][3] Attachment also describes the function of availability, which is the degree to which the authoritative figure is responsive to the child's needs and shares communication with them.
Childhood attachment can define characteristics that will shape the child's sense of self, their forms of emotion-regulation, and how they carry out relationships with others.
Attachment theory (developed by the psychoanalyst Bowlby 1969, 1973, 1980) is rooted in the ethological notion that a newborn child is biologically programmed to seek proximity with caregivers, and this proximity-seeking behavior is naturally selected.
Bowlby's colleague Mary Ainsworth identified that an important factor which determines whether a child will have a secure or insecure attachment is the degree of sensitivity shown by their caregiver: The sensitive caregiver responds socially to attempts to initiate social interaction, playfully to his attempts to initiate play.
The clinical concept of RAD differs in a number of fundamental ways from the theory and research driven attachment classifications based on the Strange Situation Procedure.
The procedure consists of eight sequential episodes in which the child experiences both separation from and reunion with the mother as well as the presence of an unfamiliar stranger.
The extent of exploration and of distress are affected by the child's temperamental make-up and by situational factors as well as by attachment status, however.
In academic publications however, the classification of infants (if subgroups are denoted) is typically simply "B1" or "B2" although more theoretical and review-oriented papers surrounding attachment theory may use the above terminology.
[11] In general, a child with an anxious-resistant attachment style will typically explore little (in the Strange Situation) and is often wary of strangers, even when the caregiver is present.
"[11] Ainsworth's narrative records showed that infants avoided the caregiver in the stressful Strange Situation Procedure when they had a history of experiencing rebuff of attachment behaviour.
Ainsworth and colleagues sometimes observed 'tense movements such as hunching the shoulders, putting the hands behind the neck and tensely cocking the head, and so on.
Lyons-Ruth has urged, however, that it should be wider 'recognized that 52% of disorganized infants continue to approach the caregiver, seek comfort, and cease their distress without clear ambivalent or avoidant behavior.
[30] Crittenden also argues that some behaviour classified as Disorganized/disoriented can be regarded as more 'emergency' versions of the avoidant and/or ambivalent/resistant strategies, and function to maintain the protective availability of the caregiver to some degree.
[33] Main and Hesse[34] found that most of the mothers of these children had suffered major losses or other trauma shortly before or after the birth of the infant and had reacted by becoming severely depressed.
[35] In fact, 56% of mothers who had lost a parent by death before they completed high school subsequently had children with disorganized attachments.
These include the caregiving and punitive behaviours also identified by Main and Cassidy (termed A3 and C3 respectively), but also other patterns such as compulsive compliance with the wishes of a threatening parent (A4).
[39] Crittenden's ideas developed from Bowlby's proposal that 'given certain adverse circumstances during childhood, the selective exclusion of information of certain sorts may be adaptive.
[40] Crittenden proposed that the basic components of human experience of danger are two kinds of information:[41] Crittenden proposes that both kinds of information can be split off from consciousness or behavioural expression as a 'strategy' to maintain the availability of an attachment figure: 'Type A strategies were hypothesized to be based on reducing perception of threat to reduce the disposition to respond.
Lyons-Ruth, for example, found that 'for each additional withdrawing behavior displayed by mothers in relation to their infant's attachment cues in the Strange Situation Procedure, the likelihood of clinical referral by service providers was increased by 50%.
[45] Behavioural problems and social competence in insecure children increase or decline with deterioration or improvement in quality of parenting and the degree of risk in the family environment.
[46] Michael Rutter describes the procedure in the following terms:[47] "It is by no means free of limitations (see Lamb, Thompson, Gardener, Charnov & Estes, 1984).
This may be a major constraint when applying the procedure in cultures, such as that in Japan (see Miyake et al., 1985), where infants are rarely separated from their mothers in ordinary circumstances.
Modified procedures based on the Strange Situation have been developed for older preschool children (see Belsky et al., 1994; Greenberg et al., 1990) but it is much more dubious whether the same approach can be used in middle childhood.
With respect to the ecological validity of the Strange Situation, a meta-analysis of 2,000 infant-parent dyads, including several from studies with non-Western language and/or cultural bases found the global distribution of attachment categorizations to be A (21%), B (65%), and C (14%).
[54][55] Of these two studies, the Japanese findings have sparked the most controversy as to the meaning of individual differences in attachment behaviour as originally identified by Ainsworth et al. (1978).
[38][56] In addition to these findings supporting the global distributions of attachment classifications in Sapporo, Behrens et al. also discuss the Japanese concept of amae and its relevance to questions concerning whether the insecure-resistant (C) style of interaction may be engendered in Japanese infants as a result of the cultural practice of amae.
A separate study was conducted in Korea, to help determine if mother-infant attachment relationships are universal or culture-specific.
[57] Van IJzendoorn and Kroonenberg conducted a meta-analysis of various countries, including Japan, Israel, Germany, China, the UK and the USA using the Strange Situation.
This follows logically from the fact that attachment theory provides for infants to adapt to changes in the environment, selecting optimal behavioural strategies.
[59][60] The original Richter's et al. (1998) scale is strongly related to secure versus insecure classifications, correctly predicting about 90% of cases.